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Physical laws, theories and quantities

In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity. It is measured in the SI unit of newtons and represented by the symbol F.


  • Development of the concept 

  • Pre-Newtonian concepts 

  • Newtonian mechanics 

  • Special theory of relativity 

  • Descriptions 

  • Fundamental forces 

  • Non-fundamental forces 

  • Rotations and torque 

  • Kinematic integrals 

  • Potential energy 

  • Units of measurement 

  • Force measurement